fabiensanglard/Prince-of-Persia-Apple-II — pull request #1 by tkchia (2013-09-26 15:20:17+00:00)
Title: Initial look at secondary copy protection, starting from `RYELLOW1.S`

I made the following changes:
- Turned the source files in `03 Disk Protection/` into symbolic links, since they are identical in content to the files in `02 POP Disk Routines/CP.525/`.
- Annotated parts of the logic in `RYELLOW1.S`.